Monkey-wrench



N0. 62!,869. v Patented Mar. 28, |8 99.

J. STYNSBEBG.

v MONKEY WRENCH.

(Application filed June 8, 1898.?

(No Mndel.)

WITNESSES. I/VVLWTOR:

'@ I .3? .ATIORJIL'Y'.

lhvrrnn STATES FF ICEQ JOHN STYNSBERG, OF BIWABIK, MINNESOTA.

MONKEY=WRENCH.

SPECIFICATION forming part of Letters Patent No. 621,869, dated March 28, 1899.

Application filed June 3, 1898. Serial No. 682,477. (No model.)

To all whom it may concern.-

Be it known that I, JOHN STYNSBERG, a citizen of the United States, residing at Biwabik, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Monkey-VVrenches; and- I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and t0 the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in monkey-wrenches; and the main object of my invention is to provide a monkey-wrench with a handle which may be readily adjusted at different angles with reference to the jaws or mouth of the wrench, and thus enable the wrench to reach and take hold of nuts located in corners and like places of machinery. This and other objects I attain by the novel construction and arrangement of parts illustrated in the accompanying drawings, in which Figure 1 is a side View of my complete wrench, and Fig. 2 is an upper edge View of Fig. 1.

Referring to the various parts in the drawings by letters of reference, A'designates the front portion of the handle of the wrench, which is bifurcated at B, and into said bifurcation is pivoted on the bolt 0 the rearwardlyextending segmental wing or tail D of the jaw E, in which the screw-threaded bar F of the adjustable jaw G slides and is guided not only by the oval hole II in which it is inserted, but

' also by having its rib I'inserted in the groove J in the angular extension K of the jaw E,

which extension gives great support to the jaw-bar F to prevent its bending backward between the jaws, as is so often the case with common wrenches when force is applied to them.

L is a knurled thumb-nut placed in the aperture M in the jaw E and screw-threaded upon the jaw-bar'F, so that the latter is moved back and forth by the turning of the nut.

In the side projection O of the handle is a groove N, which when the handle is adjusted at its limit, as shown in dotted lines in Fig. 1, straddles the rear edge of the jaw-bar F, which is thereby steadied and impelled in either direction by turning the wrench upside down for tightening or loosening nuts, bolts, or other objects.

Through the hole P in the handle and either one of the holes Q in the segmental tail D, I put the pin R, and thus lock the wrench and the handle at any desired angle relatively to each other. This pin R is held in place by having its head S met in front by the handle and in rear'by the latch T, which is pivotally secured to and held by frictional contact with the handle, preferably upon the bolt 0, and is provided With a notch U, which houses the head of the pin.

In operation the nut L is turned the same as on other wrenches until the mouth of the wrench fits the nut or bolt-head it is to operate on. The latch'T is then swung to one side and the pin R extracted enough to allow the handle to swing clear of any obstructions to its operation. The pin R is then replaced into such a hole of the tail D as will allow the handle to move in using the wrench. If the motion of the handle is Very much limited by obstructions, the latch may be left open and the pin moved from hole to hole during the operation. 7

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a monkey-wrench, the combination of the primary jaw E, having the groove J, angular arm K, the two intersecting apertures H and M, and the segmental plate D, provided with a segmental row of apertures Q; the secondary jaw G, having the screw-thread ed arm F inserted in the aperture II, and the rib I, guiding in the groove J, the milled nut L, inserted in the aperture M, and engaging the arm F,which extends beyond the primary position to guide and support the jaw-arm F, IO

substantially as shown and described and for the purpose set forth.

In testimony whereofl affix my signature in presence of two witnesses.

JOHN STYNSBERG. \Vitnesses:

SWAN. E. MORAN, E. II. BECK. 

